import re
text="for an example 'MR GEORGE 51' or 'MRS GEORGE 52' or 'GEORGE 53'"
print(re.findall(r'\b(?<!\bmr\s)(?<!\bmrs\s)\S+\s+\d{1,2}\b', text, re.I))
print(re.findall(r'\b(?<!\bmr\s)(?<!\bmrs\s)(\S+)\s+(\d{1,2})\b', text, re.I))
aW1wb3J0IHJlCnRleHQ9ImZvciBhbiBleGFtcGxlICdNUiBHRU9SR0UgNTEnIG9yICdNUlMgR0VPUkdFIDUyJyBvciAnR0VPUkdFIDUzJyIKcHJpbnQocmUuZmluZGFsbChyJ1xiKD88IVxibXJccykoPzwhXGJtcnNccylcUytccytcZHsxLDJ9XGInLCB0ZXh0LCByZS5JKSkKcHJpbnQocmUuZmluZGFsbChyJ1xiKD88IVxibXJccykoPzwhXGJtcnNccykoXFMrKVxzKyhcZHsxLDJ9KVxiJywgdGV4dCwgcmUuSSkp